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118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
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KindlePDFViewer: a DC abstraction
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Copyright (C) 2012 Hans-Werner Hilse <hilse@web.de>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "drawcontext.h"
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static int newDrawContext(lua_State *L) {
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int rotate = luaL_optint(L, 1, 0);
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double zoom = luaL_optnumber(L, 2, (double) 1.0);
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int offset_x = luaL_optint(L, 3, 0);
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int offset_y = luaL_optint(L, 4, 0);
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double gamma = luaL_optnumber(L, 5, (double) -1.0);
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DrawContext *dc = (DrawContext*) lua_newuserdata(L, sizeof(DrawContext));
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dc->rotate = rotate;
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dc->zoom = zoom;
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dc->offset_x = offset_x;
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dc->offset_y = offset_y;
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dc->gamma = gamma;
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luaL_getmetatable(L, "drawcontext");
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lua_setmetatable(L, -2);
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return 1;
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}
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static int dcSetOffset(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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dc->offset_x = luaL_checkint(L, 2);
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dc->offset_y = luaL_checkint(L, 3);
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return 0;
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}
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static int dcGetOffset(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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lua_pushinteger(L, dc->offset_x);
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lua_pushinteger(L, dc->offset_y);
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return 2;
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}
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static int dcSetRotate(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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dc->rotate = luaL_checkint(L, 2);
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return 0;
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}
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static int dcSetZoom(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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dc->zoom = luaL_checknumber(L, 2);
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return 0;
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}
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static int dcGetRotate(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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lua_pushinteger(L, dc->rotate);
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return 1;
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}
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static int dcGetZoom(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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lua_pushnumber(L, dc->zoom);
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return 1;
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}
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static int dcSetGamma(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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dc->gamma = luaL_checknumber(L, 2);
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return 0;
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}
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static int dcGetGamma(lua_State *L) {
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
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lua_pushnumber(L, dc->gamma);
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return 1;
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}
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static const struct luaL_Reg drawcontext_meth[] = {
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{"setRotate", dcSetRotate},
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{"getRotate", dcGetRotate},
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{"setZoom", dcSetZoom},
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{"getZoom", dcGetZoom},
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{"setOffset", dcSetOffset},
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{"getOffset", dcGetOffset},
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{"setGamma", dcSetGamma},
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{"getGamma", dcGetGamma},
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{NULL, NULL}
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};
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static const struct luaL_Reg drawcontext_func[] = {
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{"new", newDrawContext},
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{NULL, NULL}
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};
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int luaopen_drawcontext(lua_State *L) {
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luaL_newmetatable(L, "drawcontext");
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lua_pushstring(L, "__index");
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lua_pushvalue(L, -2);
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lua_settable(L, -3);
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luaL_register(L, NULL, drawcontext_meth);
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lua_pop(L, 1);
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luaL_register(L, "DrawContext", drawcontext_func);
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return 1;
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}
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